Wallace, R. F. (1956). An evaluation of wildlife resources in the State of Washington. State College of Washington, School of Economics and Business, Bureau of Economic and Business Research.
Dyfyniad Arddull ChicagoWallace, Robert F. An Evaluation of Wildlife Resources in the State of Washington. Pullman: State College of Washington, School of Economics and Business, Bureau of Economic and Business Research, 1956.
Dyfyniad MLAWallace, Robert F. An Evaluation of Wildlife Resources in the State of Washington. State College of Washington, School of Economics and Business, Bureau of Economic and Business Research, 1956.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.